Tyson continued, "He went 10 rounds, scored punches on the greatest fighter in the last 20, 100 years."

"Imagine a guy who’s never had a boxing match and he’s fighting me? He goes 10 rounds and we’re fighting?"

"We go 10 rounds, that’s a bad motherfu**er," Tyson said.

Well, Conor McGregor saw the clip ... and issued a strongly worded statement of his own.

"Thank you Mike, and just know that for the inevitable rematch, with the knowledge I now hold of Floyd’s style, plus under the tutelage of my old school boxing coach, I will crack the puzzle, and I will beat Floyd. I promise my life on it."

McGregor added, "It is great to see you back Iron Mike."

As we previously reported, Conor has been TRYING to lock up a rematch with Floyd for a while ... but Floyd hasn't signed a contract yet.

Floyd had planned to fight TWICE in 2020 -- once against a respected boxer and again in a UFC-involved crossover, but the COVID-19 pandemic and some personal tragedies in Floyd's life now make a comeback unlikely.